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2 years ago

Solve for x.

Mathematics

2 answers:

Ber [7]2 years ago

8 0

Answer:

x < -6

Step-by-step explanation:

-5x - 8 > 22

Add 8 to both sides: -5x > 30

Divide both sides by 5: -x > 6

Divide both sides by -1 (reverse sign): x < -6

Korolek [52]2 years ago

4 0

Answer:

x < -6

Step-by-step explanation:

First we want to move all terms not containing x to the right side

-5x > 22 + 8

-5x > 30

Then we want to divide

-5x/5 < 30/-5

30/-5

x < - 6

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nika2105 [10]

Answer:

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I hope this is good enough:

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3 years ago

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Problem PageQuestion The mass of a radioactive substance follows a continuous exponential decay model, with a decay rate paramet

asambeis [7]

Answer:

Step-by-step explanation:

<u>Exponential Model</u>

The exponential model is often used to simulate the behavior of a magnitude that either grow or decay in proportion to the existing amount of that magnitude.

The model can be expressed as

$M=M_oe^{kt}$

In this case, Mo is the initial mass of the radioactive substance and k is a constant which value is positive if the mass is growing or negative if the mass is decaying.

The value of k is not precisely given in the question, we are assuming $k=-0.2$

The model is now

$M=M_oe^{-0.2t}$

We are required to compute the time it takes the mass to reach one-half of its initial value:

$\displaystyle \frac{M_o}{2}=M_oe^{-0.2t}$

Simplifying

$\displaystyle \frac{1}{2}=e^{-0.2t}$

Taking logarithms

$\displaystyle ln\frac{1}{2}=ln(e^{-0.2t})=-0.2t$

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6 0

3 years ago

(05.03 LC)

never [62]

Answer:

The correct answer is x = -5

Step-by-step explanation:

All vertical lines can we written in terms of x = (a number). You can find this number in the ordered pair under the x-coordinate. In this case it is -5.

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3 years ago

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Iteru [2.4K]

Answer:

9.0

Step-by-step explanation:

Took the test

5 0

3 years ago